1.In loess region,the average content of total Zn in soil is close to that of loessal parent material,but lower than that of the country and higher than that of the world.2.The relationship between the soil texture and Zn content is quite clear,the coarser the soil texture,the lower the content of Zn in soil.The content of available Zn in soil is positively correlated with the content of organic matter and negatively correlated with the content of CaCO₃ in soil.In this region,the content of organic matter is lower and the content of CaCO₃ is higher.Consequently,the soil deficient in Zn is widely distributed.and it is about more than 50% of area of this region.In addition to application of Zn fer tilizer,such measures as application of organic fertilizer,green manure,afforestation and sowing grass,sewerage irrigation,application of a great quantity of Mn fetilizer,etc.may increase the content of soil available Zn.